Special Marine Warning Issued for Lake Michigan Nearshore and Open Waters from South Haven to Grand Haven
The National Weather Service has issued a Special Marine Warning for Lake Michigan waters between South Haven and Grand Haven due to a severe thunderstorm capable of producing large hail.
Alert Details
The National Weather Service in Grand Rapids MI has issued a Special Marine Warning (SMW) for the nearshore and open waters of Lake Michigan. This alert was triggered by radar-indicated severe weather moving through the region.
Affected Areas
The warning covers the following geographic regions:
- Nearshore and Open Waters from South Haven to Grand Haven, MI
- Lake Michigan from Holland to Grand Haven, MI, 5NM offshore to Mid Lake
- Lake Michigan from South Haven to Holland, MI, 5NM offshore to Mid Lake
Specific locations impacted include Saugatuck Pier Heads, Port Sheldon Harbor, Grand Haven Light, and Holland Light.
What You Should Do
Mariners and residents in the affected coastal areas should move to safe harbor immediately. Remain in a secure location until the hazardous weather conditions have passed to avoid potential injury or damage.
Expected Conditions
At 7:34 PM EDT, a severe thunderstorm was located approximately 22 nautical miles west of Saugatuck Pier Heads. The storm is moving east at a high speed of 60 knots.
- Hazard: Large hail
- Source: Radar indicated
- Impact: Large hail could result in structural damage to vessels and equipment.
Timeline
The alert is effective immediately as of 7:34 PM EDT on March 10, 2026. The warning is currently scheduled to expire at 8:15 PM EDT on the same evening.
Source: NOAA Official Notice
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